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<div class="title">b2BlockAllocator.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">*</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">* This software is provided &#39;as-is&#39;, without any express or implied</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">* warranty.  In no event will the authors be held liable for any damages</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">* arising from the use of this software.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">* Permission is granted to anyone to use this software for any purpose,</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">* including commercial applications, and to alter it and redistribute it</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">* freely, subject to the following restrictions:</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">* 1. The origin of this software must not be misrepresented; you must not</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">* claim that you wrote the original software. If you use this software</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">* in a product, an acknowledgment in the product documentation would be</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">* appreciated but is not required.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">* 2. Altered source versions must be plainly marked as such, and must not be</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">* misrepresented as being the original software.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">* 3. This notice may not be removed or altered from any source distribution.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#ifndef B2_BLOCK_ALLOCATOR_H</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define B2_BLOCK_ALLOCATOR_H</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="b2_settings_8h.html">Box2D/Common/b2Settings.h</a>&gt;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;Box2D/Common/b2TrackedBlock.h&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keyword">const</span> int32 b2_chunkSize = 16 * 1024;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="keyword">const</span> int32 b2_maxBlockSize = 640;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">const</span> int32 b2_blockSizes = 14;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">const</span> int32 b2_chunkArrayIncrement = 128;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">struct </span>b2Block;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">struct </span>b2Chunk;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classb2_block_allocator.html">   36</a></span>&#160;<span class="keyword">class </span><a class="code" href="classb2_block_allocator.html">b2BlockAllocator</a></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <a class="code" href="classb2_block_allocator.html">b2BlockAllocator</a>();</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    ~<a class="code" href="classb2_block_allocator.html">b2BlockAllocator</a>();</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keywordtype">void</span>* <a class="code" href="classb2_block_allocator.html#a437bf775c23f6e36af11a6d1653d7040">Allocate</a>(int32 size);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keywordtype">void</span> <a class="code" href="classb2_block_allocator.html#a945fdf86e260318b930a53dcc887ca8b">Free</a>(<span class="keywordtype">void</span>* p, int32 size);</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordtype">void</span> Clear();</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    uint32 <a class="code" href="classb2_block_allocator.html#aa26606aa59be5d1cbd45d8e21d42a61f">GetNumGiantAllocations</a>() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    b2Chunk* m_chunks;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    int32 m_chunkCount;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    int32 m_chunkSpace;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    b2Block* m_freeLists[b2_blockSizes];</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    <span class="comment">// Record giant allocations--ones bigger than the max block size</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <a class="code" href="classb2_tracked_block_allocator.html">b2TrackedBlockAllocator</a> m_giants;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    <span class="keyword">static</span> int32 s_blockSizes[b2_blockSizes];</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keyword">static</span> uint8 s_blockSizeLookup[b2_maxBlockSize + 1];</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">bool</span> s_blockSizeLookupInitialized;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;};</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="classb2_block_allocator_html_a945fdf86e260318b930a53dcc887ca8b"><div class="ttname"><a href="classb2_block_allocator.html#a945fdf86e260318b930a53dcc887ca8b">b2BlockAllocator::Free</a></div><div class="ttdeci">void Free(void *p, int32 size)</div><div class="ttdoc">Free memory. This uses b2Free if the size is larger than b2_maxBlockSize. </div><div class="ttdef"><b>Definition:</b> b2BlockAllocator.cpp:163</div></div>
<div class="ttc" id="classb2_block_allocator_html"><div class="ttname"><a href="classb2_block_allocator.html">b2BlockAllocator</a></div><div class="ttdef"><b>Definition:</b> b2BlockAllocator.h:36</div></div>
<div class="ttc" id="classb2_block_allocator_html_aa26606aa59be5d1cbd45d8e21d42a61f"><div class="ttname"><a href="classb2_block_allocator.html#aa26606aa59be5d1cbd45d8e21d42a61f">b2BlockAllocator::GetNumGiantAllocations</a></div><div class="ttdeci">uint32 GetNumGiantAllocations() const </div><div class="ttdoc">Returns the number of allocations larger than the max block size. </div><div class="ttdef"><b>Definition:</b> b2BlockAllocator.cpp:100</div></div>
<div class="ttc" id="b2_settings_8h_html"><div class="ttname"><a href="b2_settings_8h.html">b2Settings.h</a></div></div>
<div class="ttc" id="classb2_block_allocator_html_a437bf775c23f6e36af11a6d1653d7040"><div class="ttname"><a href="classb2_block_allocator.html#a437bf775c23f6e36af11a6d1653d7040">b2BlockAllocator::Allocate</a></div><div class="ttdeci">void * Allocate(int32 size)</div><div class="ttdoc">Allocate memory. This uses b2Alloc if the size is larger than b2_maxBlockSize. </div><div class="ttdef"><b>Definition:</b> b2BlockAllocator.cpp:105</div></div>
<div class="ttc" id="classb2_tracked_block_allocator_html"><div class="ttname"><a href="classb2_tracked_block_allocator.html">b2TrackedBlockAllocator</a></div><div class="ttdoc">Allocator of blocks which are tracked in a list. </div><div class="ttdef"><b>Definition:</b> b2TrackedBlock.h:62</div></div>
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